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  • C12P17/00
    		•  Preparation of heterocyclic carbon compounds with only O, N, S, Se, or Te as ring hetero atoms (C12P 13/04-C12P 13/24 take precedence) [3] HB CC 4B064
  • C12P17/02
    		•  .Oxygen as only ring hetero atoms [3] HB CC 4B064
  • C12P17/04
    		•  ..containing a five-membered hetero ring, e.g. griseofulvin [3] HB CC 4B064
  • C12P17/06
    		•  ..containing a six-membered hetero ring, e.g. fluorescein [3] HB CC 4B064
  • C12P17/08
    		•  ..containing a hetero ring of at least seven ring members, e.g. zearalenone, macrolide aglycons [3] HB CC 4B064
  • C12P17/10
    		•  .Nitrogen as only ring hetero atom [3] HB CC 4B064
  • C12P17/12
    		•  ..containing a six-membered hetero ring [3] HB CC 4B064
  • C12P17/14
    		•  .Nitrogen or oxygen as hetero atom and at least one other diverse hetero ring atom in the same ring [3] HB CC 4B064
  • C12P17/16
    		•  .containing two or more hetero rings [3] HB CC 4B064
  • C12P17/18
    		•  .containing at least two hetero rings condensed among themselves or condensed with a common carbocyclic ring system, e.g. rifamycin [3] HB CC 4B064
  • C12P17/18@A
    		•  Condensed hetero rings with N1 hetero atoms HB CC 4B064
  • C12P17/18@B
    		•  Condensed hetero rings with N2 or more hetero atoms HB CC 4B064
  • C12P17/18@C
    		•  Condensed hetero rings having only N and O as hetero atoms HB CC 4B064
  • C12P17/18@D
    		•  Condensed hetero rings having only O as hetero atoms HB CC 4B064
  • C12P17/18@Z
    		•  Others HB CC 4B064
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